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#include <QApplication>
#include <QQmlEngine>
#include <QQmlComponent>
#include <QDebug>
#include <QLineEdit>
#include "lineedit.h"

int main(int argc, char ** argv)
{
    QApplication app(argc, argv);

// ![0]
    // 注册一个QLineEdit的扩展类型LineEditExtension，
    // 扩展类型的属性可以直接在QLineEdit中访问
    // LineEditExtension作为QLineEdit的子对象创建，保存一个QLineEdit的指针来访问它的属性
    // 扩展类型提供了在不修改原有类型代码的基础上扩展原有类型的方法，可以在qml层无感知的
    // 在原有类型中使用扩展类型的属性
    qmlRegisterExtendedType<QLineEdit, LineEditExtension>("People", 1,0, "QLineEdit");
// ![0]

// ![1]
    QQmlEngine engine;
    QQmlComponent component(&engine, QUrl("qrc:example.qml"));
    QLineEdit *edit = qobject_cast<QLineEdit *>(component.create());
// ![1]

    if (edit) {
        edit->show();
        return app.exec();
    } else {
        qWarning() << component.errors();
        return 0;
    }
}
